Ammonia distillation tower

Abstract

The ammonia still comprises an ammonia still body, an ammonia still kettle and an ammonia still skirt, a seal head is arranged inside the ammonia still body and divides the inside of the ammonia still body into two independent spaces, namely an ammonia still flash section and an ammonia still distillation section, an ammonia still gas phase outlet communicated with the inside of the ammonia still flash section is formed in the top of the ammonia still flash section, and an ammonia still gas phase outlet communicated with the inside of the ammonia still distillation section is formed in the top of the ammonia still distillation section. A first demister and a heater are sequentially arranged in the flash section of the ammonia still from top to bottom, a vaporizing chamber is formed between the first demister and the heater, and an ammonia still feeding port communicated with the interior of the vaporizing chamber is formed in the outer side of the flash section of the ammonia still; an upper-section steam inlet and an upper-section condensed water outlet which are communicated with the heater are formed in the outer side of the flash section of the ammonia still, and an ammonia still upper-section bottom outlet communicated with the inside of the flash section of the ammonia still is formed in the position, close to the bottom, of the outer side of the flash section of the ammonia still. According to the utility model, by optimizing the internal layout and assembly arrangement of the ammonia still, the efficient ammonia still of materials is realized, the energy consumption is reduced, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of chemical equipment, concretely relates to an ammonia distillation tower. BACKGROUND

[0002] In the chemical production process, as an important separation equipment, the ammonia distillation tower is widely used in the ammonia distillation treatment of various materials. The traditional ammonia distillation tower structure often has problems such as low ammonia distillation efficiency, high energy consumption and complex operation, which affects the efficiency and product quality of chemical production. Therefore, developing an ammonia distillation tower with more reasonable structure and higher ammonia distillation efficiency has become an urgent need in the current chemical equipment technology field. CONTENT OF THE UTILITY MODEL

[0003] The technical problem to be solved by the utility model is to provide an ammonia distillation tower which realizes efficient ammonia distillation of materials, reduces energy consumption and improves production efficiency by optimizing the internal layout and component setting of the ammonia distillation tower.

[0004] The utility model adopts the technical scheme of an ammonia distillation tower, which comprises an ammonia distillation tower body, an ammonia distillation tower kettle arranged at the bottom of the ammonia distillation tower body and communicated with the ammonia distillation tower body and an ammonia distillation tower skirt arranged at the bottom of the ammonia distillation tower body. An end cover is arranged inside the ammonia distillation tower body and is sealed with the inner side wall of the ammonia distillation tower body. The end cover divides the inside of the tower body into two independent spaces, i.e. an ammonia distillation tower flash distillation section and an ammonia distillation tower distillation section, from top to bottom. An ammonia distillation tower gas phase outlet is arranged at the top of the ammonia distillation tower flash distillation section and is communicated with the inside of the ammonia distillation tower flash distillation section. A first defoamer and a heater are arranged in the ammonia distillation tower flash distillation section from top to bottom. A vaporization chamber is formed between the first defoamer and the heater. An ammonia distillation tower feed inlet is arranged outside the ammonia distillation tower flash distillation section and is communicated with the inside of the vaporization chamber. An upper section steam inlet and an upper section condensed water outlet are arranged outside the ammonia distillation tower flash distillation section and are communicated with the heater. An ammonia distillation tower upper section bottom outlet is arranged outside the ammonia distillation tower flash distillation section and is communicated with the inside of the ammonia distillation tower flash distillation section. A second defoamer and a plurality of trays are arranged in the distillation section from top to bottom. The plurality of trays are arranged staggeredly from top to bottom. An ammonia distillation tower lower section gas phase outlet is arranged on the end cover and is communicated with the inside of the ammonia distillation tower distillation section and extends to the outside of the ammonia distillation tower body. An ammonia distillation tower lower section material inlet is arranged outside the distillation section and is communicated with the position between the second defoamer and the uppermost tray. The ammonia distillation tower upper section bottom outlet is communicated with the ammonia distillation tower lower section material outlet. An ammonia distillation tower reboiling return inlet is arranged outside the distillation section and is communicated with the inside of the distillation section. An ammonia distillation tower discharge outlet is arranged at the bottom of the ammonia distillation tower kettle and is communicated with the inside of the ammonia distillation tower kettle. The ammonia distillation tower discharge outlet and the ammonia distillation tower reboiling return inlet are communicated through a pipeline. An ammonia distillation tower steam coil is arranged outside the ammonia distillation tower kettle. An ammonia distillation tower external heat steam inlet and an ammonia distillation tower external heat condensed water outlet are arranged on the ammonia distillation tower steam coil and are communicated with the ammonia distillation tower steam coil.

[0005] One of the embodiments, the ammonia tower body and ammonia tower kettle between the ammonia tower conical transition section is equipped.

[0006] One of the embodiments, the heater Shanghai is equipped with the exhaust port and the exhaust port that communicates therewith.

[0007] One of the embodiments, each tray includes the liquid receiving tray arranged in the inner side wall of the ammonia tower distillation section and the tray connected with the liquid receiving tray, the end of the tray away from the liquid receiving tray is connected with the water baffle, the lower end of the water baffle is connected with the inclined liquid downcomer, the liquid downcomer of the upper layer is inclined to the direction of the liquid receiving tray below.

[0008] One of the embodiments, the upper surface of the liquid receiving tray is lower than the upper surface of the tray, and the upper surface of the water baffle is higher than the upper surface of the tray.

[0009] One of the embodiments, the ammonia tower distillation section is provided with an ammonia tower feed baffle corresponding to the position of the material inlet of the lower section of the ammonia tower.

[0010] One of the embodiments, the inner bottom surface of the ammonia tower kettle is provided with an ammonia tower anti-vortex baffle at a position outside the material outlet of the ammonia tower.

[0011] The beneficial effects of the present application are:

[0012] 1. By optimizing the internal layout and component setting of the ammonia tower, the ammonia evaporation efficiency is improved, and the energy consumption is reduced.

[0013] 2. The first and second demisters are provided, which effectively avoid the influence of foam in the material on the ammonia evaporation effect.

[0014] 3. The optimized design of the tray structure further improves the ammonia evaporation efficiency of the material.

[0015] 4. The setting of the steam coil further improves the ammonia evaporation efficiency, and is easy to connect with the external steam source and condensate discharge system.

[0016] 5. The overall structure is compact and easy to operate, and is suitable for material ammonia evaporation treatment in various chemical production processes. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The structure of the present application is shown in the figure;

[0018] Figure 2 The tray structure of the present application is shown in the figure.

[0019] In the figure: 711, ammonia distillation tower body; 712, ammonia distillation tower kettle; 713, ammonia distillation tower skirt; 714, head; 715, ammonia distillation tower flash section; 716, ammonia distillation tower distillation section; 717, ammonia distillation tower gas phase outlet; 718, first demister; 719, heater; 7110, vaporization chamber; 7111, ammonia distillation tower feed inlet; 7112, upper section steam inlet; 7113, upper section condensate water outlet; 7114, ammonia distillation tower upper section bottom outlet; 7115, second demister; 7116, tray; 7117, ammonia distillation tower lower section gas phase outlet; 7118, ammonia distillation tower lower section material inlet; 7119, ammonia distillation tower reboiling return inlet; 7120, ammonia distillation tower discharge outlet; 7121, ammonia distillation tower steam coil; 7122, ammonia distillation tower external heat tracing steam inlet; 7123, ammonia distillation tower external heat tracing condensate water outlet; 7124, ammonia distillation tower conical transition section; 7125, exhaust outlet; 7126, exhaust outlet; 7127, ammonia distillation tower feed baffle; 7128, ammonia distillation tower anti-vortex baffle; 71161, liquid receiving tray; 71162, tray; 71163, water baffle; 71164, downcomer. DETAILED DESCRIPTION

[0020] The utility model will be combined with specific embodiments and the drawings further detailed below.

[0021] As Figure 1 and Figure 2As shown, an ammonia distillation tower includes an ammonia distillation tower body 711, an ammonia distillation tower kettle 712 arranged at the bottom of the ammonia distillation tower body 711 and communicated with the ammonia distillation tower body 711, and an ammonia distillation tower skirt 713 arranged at the bottom of the ammonia distillation tower body 711. The ammonia distillation tower body 711 is internally provided with a head 714 sealed with the inner side wall of the ammonia distillation tower body 711. The head 714 divides the interior of the tower body into two independent spaces, an ammonia distillation tower flash distillation section 715 and an ammonia distillation tower distillation section 716, from top to bottom. The ammonia distillation tower flash distillation section 715 is provided at the top with an ammonia distillation tower gas phase outlet 717 communicated with the interior thereof. The ammonia distillation tower flash distillation section 715 is sequentially provided from top to bottom with a first defoamer 718 and a heater 719. The first defoamer 718 and the heater 719 form a vaporization chamber 7110 therebetween. The ammonia distillation tower flash distillation section 715 is externally provided with an ammonia distillation tower feed inlet 7111 communicated with the interior of the vaporization chamber 7110. The ammonia distillation tower flash distillation section 715 is externally provided with an upper section steam inlet 7112 and an upper section condensed water outlet 7113 communicated with the heater 719. The ammonia distillation tower flash distillation section 715 is externally provided at a position close to the bottom with an ammonia distillation tower upper section bottom outlet 7114 communicated with the interior thereof. The distillation section is sequentially provided from top to bottom with a second defoamer 7115 and a plurality of trays 7116. The plurality of trays 7116 are staggered from top to bottom. The head 714 is provided with an ammonia distillation tower lower section gas phase outlet 7117 communicated with the interior of the ammonia distillation tower distillation section 716 and extending to the outside of the ammonia distillation tower body 711. The distillation section is externally provided with an ammonia distillation tower lower section material inlet 7118 communicated with a position between the second defoamer 7115 and the uppermost tray 7116. The ammonia distillation tower upper section bottom outlet 7114 is communicated with the ammonia distillation tower lower section material outlet. The ammonia distillation tower distillation section 716 is externally provided at a position close to the bottom with an ammonia distillation tower reboiling return inlet 7119 communicated with the interior thereof. The bottom of the ammonia distillation tower kettle 712 is provided with an ammonia distillation tower discharge outlet 7120 communicated with the interior thereof. The ammonia distillation tower discharge outlet 7120 is communicated with the ammonia distillation tower reboiling return inlet 7119 through a pipeline. The ammonia distillation tower kettle 712 is externally provided with an ammonia distillation tower steam coil 7121. The ammonia distillation tower steam coil 7121 is provided with an ammonia distillation tower external heat steam inlet 7122 and an ammonia distillation tower external heat condensed water outlet 7123 communicated therewith.

[0022] In this embodiment, a conical transition section 7124 is arranged between the ammonia distillation tower body 711 and the ammonia distillation tower kettle 712.

[0023] In this embodiment, the heater 719 is provided at the top with an exhaust outlet 7125 and a complete exhaust outlet 7126 communicated therewith.

[0024] In the embodiment, each of the trays 7116 comprises a liquid receiving tray 71161 arranged on the inner side wall of the ammonia distillation tower distillation section 716 and a tray 71162 connected with the liquid receiving tray 71161, the tray 71162 is connected with a water baffle 71163 at one end away from the liquid receiving tray 71161, the lower end of the water baffle 71163 is connected with a liquid downcomer 71164 arranged in an inclined manner, and the liquid downcomer 71164 of the upper layer is inclined towards the liquid receiving tray 71161 below.

[0025] In the embodiment, the upper surface of the liquid receiving tray 71161 is lower than the upper surface of the tray 71162, and the upper surface of the water baffle 71163 is higher than the upper surface of the tray 71162.

[0026] In the embodiment, the ammonia distillation tower distillation section 716 is provided with an ammonia distillation tower feed baffle 7127 at a position corresponding to the material inlet 7118 of the lower section of the ammonia distillation tower.

[0027] In the embodiment, the lower surface of the ammonia distillation tower kettle 712 is provided with an ammonia distillation tower anti-vortex baffle 7128 at a position outside the material outlet 7120 of the ammonia distillation tower.

[0028] The functions of the components of the utility model are as follows:

[0029] The ammonia distillation tower body 711 is the main part of the ammonia distillation tower, and the inside of the ammonia distillation tower body 711 is provided with a head 714 sealed with the inner side wall of the ammonia distillation tower body 711, which divides the inside of the ammonia distillation tower body 711 into two independent spaces, i.e., an ammonia distillation tower flash section 715 and an ammonia distillation tower distillation section 716 from top to bottom.

[0030] The ammonia distillation tower kettle 712 is arranged at the bottom of the ammonia distillation tower body 711 and communicates with the ammonia distillation tower body 711, and is used for collecting the material after ammonia distillation.

[0031] The ammonia distillation tower skirt 713 is arranged at the bottom of the ammonia distillation tower body 711 and is used for supporting the entire ammonia distillation tower structure.

[0032] In the ammonia distillation tower flash section 715, the top is provided with an ammonia distillation tower gas phase outlet 717 for discharging the gaseous material after ammonia distillation. The first defoamer 718 and the heater 719 are arranged in the flash section from top to bottom, and the vaporization chamber 7110 is formed between the first defoamer 718 and the heater 719 for vaporization treatment of the material. The ammonia distillation tower feed inlet 7111 is arranged on the outer side of the flash section and communicates with the inside of the vaporization chamber 7110, which is used for adding the material to be distilled to the ammonia distillation tower. At the same time, the upper section steam inlet 7112 and the upper section condensed water outlet 7113 are arranged on the outer side of the flash section and communicate with the heater 719, which are used for steam supply and condensed water discharge of the heater 719. The ammonia distillation tower upper section bottom outlet 7114 is arranged at a position close to the bottom of the outer side of the flash section and communicates with the inside thereof, which is used for discharging the material treated in the flash section.

[0033] In the ammonia distillation section 716, a second demister 7115 and a plurality of trays 7116 are arranged from top to bottom inside the ammonia distillation section 716. The plurality of trays 7116 are staggered from top to bottom for further ammonia distillation of the material. The head 714 is provided with an ammonia distillation section lower gas phase outlet 7117 which is in communication with the inside of the ammonia distillation section 716 and extends to the outside of the ammonia distillation tower body 711, for discharging the gas phase material processed in the distillation section. The outside of the distillation section is provided with an ammonia distillation section lower material inlet 7118 which is in communication with the position between the second demister 7115 and the uppermost tray 7116, for adding material to the distillation section. The ammonia distillation section upper section outlet 7114 is in communication with the ammonia distillation section lower material inlet 7118, forming a continuous processing of the material. The position close to the bottom of the outside of the distillation section is provided with an ammonia distillation section reboiling return port 7119 which is in communication with the inside thereof, for returning part of the material to the distillation section for re-ammonia distillation.

[0034] In addition, a conical transition section 7124 is provided between the ammonia distillation tower body 711 and the ammonia distillation tower kettle 712 for connecting and transitioning the two parts. The heater 719 is provided with an exhaust port 7125 and a vent port 7126 which are in communication with the heater 719, for gas discharge and material discharge of the heater 719. Each tray 7116 includes a liquid receiving tray 71161 arranged on the inner side wall of the distillation section and a tray plate 71162 connected to the liquid receiving tray 71161. The end of the tray plate 71162 away from the liquid receiving tray 71161 is connected with a water baffle 71163, and the lower end of the water baffle 71163 is connected with an inclined liquid downcomer 71164. The liquid downcomer 71164 of the upper layer is inclined towards the liquid receiving tray 71161 below to optimize the flow of the material and the ammonia distillation effect. The upper surface of the liquid receiving tray 71161 is lower than the upper surface of the tray plate 71162, and the upper surface of the water baffle 71163 is higher than the upper surface of the tray plate 71162 to further improve the ammonia distillation efficiency.

[0035] The inside of the ammonia distillation section 716 is provided with an ammonia distillation tower feed baffle 7127 corresponding to the position of the ammonia distillation section lower material inlet 7118, for reducing the impact force when the material enters the distillation section, avoiding damage to the tray 7116. The inner bottom surface of the ammonia distillation kettle 712 is provided with an ammonia distillation anti-vortex baffle 7128 at a position outside the ammonia distillation outlet 7120, for preventing the material from forming vortex in the kettle, affecting the ammonia distillation effect.

[0036] The outside of the ammonia distillation kettle 712 is provided with an ammonia distillation tower steam coil 7121 for heating the material in the ammonia distillation tower to improve the ammonia distillation efficiency. The steam coil is provided with an ammonia distillation tower external heat steam inlet 7122 and an ammonia distillation tower external heat condensate outlet 7123 for connecting an external steam source and a condensate discharge system.

[0037] When the ammonia distillation tower is working, the material from the reactor 3 with pressure 5.0Mpa and temperature 80-100℃ is self-flowing into the vaporization chamber 7110 of the flash evaporation section 715 of the ammonia distillation tower with pressure 0.9-1.6Mpa, and then rapidly flash evaporates and vaporizes by itself and by the heat supplied by the upper heater 719, and the ammonia output from the flash evaporation section 715 of the ammonia distillation tower accounts for about 85% of the total ammonia content of the material. The first demister 718 is an internal wire mesh demisting filler, which is used to capture the ethanolamine liquid droplets entrained in the rising ammonia gas, and the demisted ammonia gas enters the gas phase outlet 717 of the ammonia distillation tower. The heater 719 is a tube heat exchanger, low-pressure steam or hot water is introduced into the tube, and the heat required for the ammonia vaporization of the material in the tube is supplied in time to maintain the material temperature stable at 80-95℃. After the material stays in the vaporization chamber 7110 and the tube of the heater 719 for a period of time, it enters the distillation section 716 of the ammonia distillation tower.

[0038] The distillation section 716 of the ammonia distillation tower is provided with a tray 7116. The material flows down from the top of the distillation section 716 of the ammonia distillation tower and passes through the tray 71162 of each tray 7116 in turn, and is in countercurrent contact with the rising vapor after being heated. After mass transfer and heat transfer, the light components (ammonia and a small amount of water) contained therein are continuously vaporized and purified, and are combined with the ammonia gas evaporated from the flash evaporation section 715 of the ammonia distillation tower and then enter the gas phase outlet 717 of the ammonia distillation tower together. The heavy components are enriched in the kettle 712 of the ammonia distillation tower after being distilled, and are discharged from the discharge port 7120 of the ammonia distillation tower.

[0039] The above-described embodiments only express the specific implementation of the present application, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the scope of protection of the present application.

Claims

1. An ammonia stripping column, characterized by: The ammonia distillation tower body (711), the ammonia distillation tower kettle (712) arranged at the bottom of the ammonia distillation tower body (711) and communicated with the ammonia distillation tower body (711), and the ammonia distillation tower skirt (713) arranged at the bottom of the ammonia distillation tower body (711), the inside of the ammonia distillation tower body (711) is provided with a head (714) sealed with the inner side wall of the ammonia distillation tower body (711), the head (714) divides the inside of the tower body into two independent spaces from top to bottom, namely the ammonia distillation tower flash distillation section (715) and the ammonia distillation tower distillation section (716), the top of the ammonia distillation tower flash distillation section (715) is provided with an ammonia distillation tower gas phase outlet (717) communicated with the inside thereof, the ammonia distillation tower flash distillation section (715) is sequentially provided with a first defoamer (718) and a heater (719) from top to bottom, the first defoamer (718) and the heater (719) form a vaporization chamber (7110) therebetween, the outside of the ammonia distillation tower flash distillation section (715) is provided with an ammonia distillation tower feed inlet (7111) communicated with the inside of the vaporization chamber (7110), the outside of the ammonia distillation tower flash distillation section (715) is provided with an upper section steam inlet (7112) and an upper section condensed water outlet (7113) communicated with the heater (719), the outside of the ammonia distillation tower flash distillation section (715) is provided with an ammonia distillation tower upper section bottom outlet (7114) communicated with the inside thereof at a position close to the bottom, the inside of the distillation section is sequentially provided with a second defoamer (7115) and a plurality of trays (7116) from top to bottom, the plurality of trays (7116) are staggered from top to bottom, the head (714) is provided with an ammonia distillation tower lower section gas phase outlet (7117) communicated with the inside of the ammonia distillation tower distillation section (716) and extending to the outside of the ammonia distillation tower body (711), the outside of the distillation section is provided with an ammonia distillation tower lower section material inlet (7118) communicated with a position between the second defoamer (7115) and the uppermost tray (7116), the ammonia distillation tower upper section bottom outlet (7114) is communicated with the ammonia distillation tower lower section material outlet, the outside of the ammonia distillation tower distillation section (716) is provided with an ammonia distillation tower reboiling return port (7119) communicated with the inside thereof at a position close to the bottom, the bottom of the ammonia distillation tower kettle (712) is provided with an ammonia distillation tower discharge port (7120) communicated with the inside thereof, the ammonia distillation tower discharge port (7120) and the ammonia distillation tower reboiling return port (7119) are communicated through a pipeline, the outside of the ammonia distillation tower kettle (712) is provided with an ammonia distillation tower steam coil (7121), the ammonia distillation tower steam coil (7121) is provided with an ammonia distillation tower external heat steam inlet (7122) and an ammonia distillation tower external heat condensed water outlet (7123) communicated therewith.

2. An ammonia stripping column according to claim 1, characterized in that: The ammonia distillation tower body (711) and the ammonia distillation tower kettle (712) are provided with an ammonia distillation tower conical transition section (7124) therebetween.

3. An ammonia stripping column according to claim 1, characterized in that: The heater (719) is provided with an exhaust port (7125) and a complete exhaust port (7126) communicated therewith.

4. An ammonia stripping column according to claim 1, characterized in that: Each of the trays (7116) comprises a liquid receiving tray (71161) arranged on the inner side wall of the ammonia distillation section (716) and a tray plate (71162) connected with the liquid receiving tray (71161), the tray plate (71162) is connected with a water baffle (71163) at one end away from the liquid receiving tray (71161), the water baffle (71163) is connected with an inclined liquid downcomer (71164) at the lower end, the liquid downcomer (71164) of the upper layer is inclined towards the liquid receiving tray (71161) below.

5. An ammonia stripping column according to claim 4, characterized in that: The upper surface of the liquid receiving tray (71161) is lower than the upper surface of the tray plate (71162), and the upper surface of the water baffle (71163) is higher than the upper surface of the tray plate (71162).

6. An ammonia stripping column according to claim 1, characterized in that: The ammonia distillation section (716) is provided with an ammonia distillation section feed baffle (7127) at a position corresponding to the ammonia distillation section lower section material inlet (7118).

7. An ammonia stripping column according to claim 1, characterized in that: The inner bottom surface of the ammonia distillation kettle (712) is provided with an ammonia distillation kettle anti-vortex baffle (7128) at a position outside the ammonia distillation kettle discharge port (7120).

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